CVE-2020-1766Network attack vector

Agent-browser script execution via inline SVG misclassification

Published Jan 10, 2020 · Updated Sep 17, 2024

Stored XSS in OTRS products allows remote authenticated users to execute JavaScript in an agent's browser through an uploaded image. The inline-image path treats a specially crafted SVG as a JPEG and renders it without neutralizing the SVG's active script content. High-privileged access is required to upload the image and an agent must view it; affected releases are ((OTRS)) Community Edition 5.0.39 and earlier and 6.0.24 and earlier, plus OTRS 7.0.13 and earlier.

CVSS severity6.1
Medium
EPSS probability1.23%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Stored XSS in OTRS products allows remote authenticated users to execute JavaScript in an agent's browser through an uploaded image. The inline-image path treats a specially crafted SVG as a JPEG and renders it without neutralizing the SVG's active script content. High-privileged access is required to upload the image and an agent must view it; affected releases are ((OTRS)) Community Edition 5.0.39 and earlier and 6.0.24 and earlier, plus OTRS 7.0.13 and earlier.

The record

CVE
CVE-2020-1766
Published
Jan 10, 2020
Updated
Sep 17, 2024
Vendor
OTRS AG
Product
OTRS
Classifications
CWE-79, T1204
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. Jan 10, 2020CVE publishedPublication date reported by the CVE source.
  2. Sep 17, 2024Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=7.0.x version 7.0.13 and prior versions

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

OTRS AG · OTRSversion=7.0.x version 7.0.13 and prior versions
OTRS AG · ((OTRS)) Community Editionversion=5.0.x version 5.0.39 and prior versions; version=6.0.x version 6.0.24 and prior versions

Published CVSS scores

6.1NIST NVDCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N
4.3NIST NVDAV:N/AC:M/Au:N/C:N/I:P/A:N
2.0OTRS AGCVSS:3.1/AV:N/AC:H/PR:H/UI:R/S:U/C:N/I:L/A:N

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 9, 2026Sep 15, 2026
Latest reporting daySep 15, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-79Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
T1204User Execution

Public exploit references

No public exploit references are available in this record.

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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